Manual performances pulling out all the stops? (5,8)

I believe the answer is:

organ recitals

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'pulling out all the stops?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'manual performances' is the wordplay.
'manual' becomes 'organ' (I can't explain this - if you can you should give a lot more credence to this answer).
'performances' becomes 'recitals' (recital is a kind of performance).
'organ'+'recitals'='ORGAN RECITALS'

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I've seen this clue in The Globe and Mail.

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